Presser-foot mechanism for sewing-machines



A. H. DE VUE.

PRESSER FOOT MECHA-NISM FUR SEWING MACHINES.

' APPLlcATmN FILED AuG.,29, 19u.

ymf, Patented Junm, 1919.

. citizen of the United States,

, presser-bar, in the narran erarae rarnirr onirica.

.ALBERT H. DE VOE, 0F WESTFIELD, y1\`|' EW JERSEY, ASSIGNOR TO THE SINGER MANUFAC- TURING COMPANY, A CORPORATION OF NEW JERSEY.

PRESSER-FDOT MECHANISM FOR SEWING-MACHINES'.

hacerse.

To all whom t may concern:

Be it known that I, ALBERT H. DE Von, a residing'l at Westfield, in the county of Union andlState of New Jersey, have invented certain new and useful Improvements in Presser- Foot y Mechanisms for Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

t:'lhis invention relates to improvements in cloth-presser mechanisms for sewlng machines and has for its primary obj ect to provide a simple and compactarrangement of main and auxiliary cloth-pressers each of which exerts upon the work a yielding pressure capable of being regulated independently of the other.

The invention has for a 'further object to provide an improved mechanism of this class in which the cloth-pressers are permitted to yield independently of each other to different thicknesses in material and in which both of the cloth-pressers are adapted to be lifted under the action of the usual lifter lever. I

In its preferred embodiment, the invention comprises a cloth-presser mechanism consisting of main and auxiliary clothpressers sustained by telescopically arranged and independently spring-pressed presser-bars, of which the outer or main presser-bar 'is vertically movable 1n bearings provided in the head of the overhanglng bracket-arm of the machine. Lifting means of the usual type are provided for the main present instance serving, through suitable connections, to liftthe auxiliary presser therewith.

In the accompanying drawings illustrating the preferred embodiment of the invention and in the several figures of which like parts are similarly designated, Figure 1 is a front end elevation of a portion of a sewing machine head with its face-plate removed. lFig. 2 is a rear side elevation of the same. Fig. 3 is a view, partly in section, illustrating the telescopically arranged presser-bars, and Fig. 4 is a sectional top the head A and Specification of Letters Patent.

Patented J une 1"?, 1919.

A hollow or tubular main presser-bar 6 is mounted for vertical movement in alined bearings formed in the head A, the upper bearing being afforded by an adjustable sleeve or bushing 7 between which and the collar 8, secured upon the presser-bar, is interposed a coiled spring 9. Secured to the lower end of the presser-bar 6 by means of the clamp-screw 10 is the split collar 11 formed with spaced ears 12 receiving the oppositely directed ivot-screws 13 held in position by the lock-nuts 14. Supported for pivotal movement upon the screws 13 is an arm 15 rotatively supporting the main clothpresser wheel 16. Secured to a lug 17 of the collar 11 is a bent spring 18 adapted to engage a shoulder 19 formed on the arm l5 to retain the presserwheel 16 in operative position.

Telescopically arranged within the hollow presser-bar 6 is the auxiliary presser-bar 20 actedcupon by the spring 21 with a pressure that may be regulated by a screw 22 threaded presser-bar and contacting with a cylindrical block 23 interposed between the screw and the spring. A lock-nut 24 serves to hold the screw 22 in adjusted position. lower end of the presser-bar 20 sustains the auxiliary cloth-presser 25 provided closely adjacent the bearing point of the presserwheel 16 with a needle-slot 26 upon opposite sides of which the edge of the presser 25 is curved to intersect a vertical plane passing through the line of feed as clearly shown in Fig. 4 of the drawings. The shank of the auxiliary presser 25 is constructed with a tail 27 in an aperture of which is secured a rod 28 passing through an alined aperture formed in a lug 29 projecting from the main presser-bar, the rod and the lug forming coperative members that prevent relative rotation between the two presser-bars. 'Ihe rod 28 is bent laterally at its upper end so, as to overlie-the laterally projecting lug 30 of the collar 8, sufficient clearance being prointo the upper part of the main' The the treadle-actuated lever 32 through the intermediary of the slotted plate 33 secured to the lug by the sereW 34.

, Having thus set forth the nature of the invention, what I claim herein isz- 1. A presser mechanism for sewing machines comprising teleseopically arranged main and'auxiliary presser-bars, cloth-pressers sustained by said presser-bars, springs exerting a pressure upon each of said presser-bars, and mutually independent means for regulating the pressures exerted by said springs.

2. presser mechanism for' sewing machines comprising telescopically arranged main and auxiliary presser-bars, cloth-pressers sustained by said presser-bars, a spring adaptedto exert a pressure upon said auxiliary presser-bar, and means carried by said main presser-bar for regulating the pressure exerted by said spring.

3. A presser mechanismfor sewing machines comprising main and auxiliary presser-bars, cloth-presser's sustained by said presser-bars, springs adapted to exert a pressure upon each of said presser-bars, means affording a bearing for the main presser-bar and adapted to regulate the pressure exerted thereupon and means carried by said main presser-bar for regulating the spring-pressure exerted upon said auxiliary presser-bar. 4. A presser mechanism for sewing machines comprising a hollow main presserbar, an auxiliary presser-bar telescopically ar ranged Within said main presser-bar, a spring Within said hollow presser-bar and adapted to exert a pressure upon said auxiliary presser-bar, and means for regulating the pressure exerted by said spring.

5. In a presser mechanism for sewing machines, main and auxiliary cloth-pressers, teleseopieally arranged presser-bars sustaining said cloth-pressers, springs adapted to exert a pressure upon each of said presserbars, mutually independent means for regulating the pressures exerted by said springs, and means for lifting said cloth-pressers against the action of sald springs.

6. A presser` mechanism for sewing machines, comprising ntelescopically arranged main and auxiliary cloth-pressers adapted to yield independently of each other to diferent thicknesses of material` main and auxiliary presser-bars sustaining said clothpressers, a collar secured upon said main presser-bar, a lifter lever adapted to act upon said collar to lift said main cloth-presser, and means for lifting said auxiliary elothpresser when the main cloth-presser is lifted by the action of said lifter lever.

7. A presser mechanism for sewing machines, comprising telescopically arranged main and auxiliary sers sustained by said presser-bars, and 1ndependently regulated springs exerting a pressure upon each of said presser-bars, said presser-bars being arranged to permit said clotlrpressers to yield independently of each other to different thicknesses of inaterial.

In testimony whereof I have signed my name to this specilication.

ALBERT H. DE VOE.

presser-bars, eloth-pres- 

